To meet the requirement of switch-based transmission network for communication reliability, IEC62439 protocol is introduced and PRP (ParallelRedundancy protocol) is adopted.
The parallel and redundancy are implemented by using data communication method in emergency shutdown for enhancing the reliability of the system.
急停系统采用数据通信的方式实现并行冗余，提高了系统的可靠性。
3
Previous research on the redundancy allocation problem for series-parallel systems has focused on where component reliability is assumed to be an exact value.